17 Tips from a Senior .NET Developer

10 years in .NET development have taught me more than just writing clean code.

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Introduction

Whether you’re a beginner or already have a few years of experience, these tips come from real-world experience — mistakes, learnings, and hard-won lessons.

The article demonstrates the best tips & tricks I’ve gathered over the years.

1. Master Asynchronous Programming

When I started with .NET, async/await was becoming mainstream. I remember writing synchronous APIs everywhere, only to see them crumble under load. Switching to async programming in C# changed everything. Use Task.Run wisely, avoid async void, and always leverage ConfigureAwait(false) in library code.

Example:

public async Task<string> FetchDataAsync(HttpClient client)
{
    var response = await client.GetAsync("https://api.example.com/data");
    response.EnsureSuccessStatusCode();
    return await response.Content.ReadAsStringAsync();
}

2. Dependency Injection is Non-Negotiable

I once worked on a legacy .NET Framework project with hard-coded dependencies. Refactoring it to…